I am working on an app having facebook integration.
App is working fine for first few times.
if i open the app from background after 2-3 hrs its showing black screen when it comes to foreground.
I am giving permission for offline access.
Any help would be thankful...
put a picture named "Default.png" in your project's resource folder may help you.
Related
I'm developing an app that works with sensitive information.
One of the requirements is that when a user puts the app in background the content that the app is currently displaying has to be hidden, so if another person navigate through the apps in background he can't see the last screen where the user was.
Any ideas on how to do that?
I tried to show an overlay when the app moves to AppLifecycleState.paused, but it doesn't work for me, the app prints a message if I want but it can't update the UI.
Edit
Shameless plug: i did a library for doing just that as I also needed it:
https://pub.dev/packages/secure_application
Answear
Build is not called after paused, at least on Android.
For Android I used a flutter_windowmanager package (modified to still be able to build on IOS):
https://github.com/neckaros/flutter_windowmanager
When my app need securing I add the flag secure:
FlutterWindowManager.addFlags(FlutterWindowManager.FLAG_SECURE)
And my app is now a black screen in the app switcher.
You should still hide content your way for when the user get back to the app.
Otherwise you can go native:
https://medium.com/#mehmetf_71205/securing-flutter-apps-ada13e806a69
I am building iphone app using sencha touch 2 command. App works fine except, when I open it on iphone it shows splash screen and then shows white blank screen for 1-2 seconds. I believe it could be the issue of gathering all sencha js files to execute. But is there any way, we can show temporary screen instead of white blank screen?
I am not using phone gap to build iphone app.
Thanks,
Viral.
In phonegap based applications, there will be a provision for increasing the splash screen duration. Search for the same thing. You may find a solution for the way you are building your app(not phonegap)
Edit: Try lazyload.. i.e., while the content is loading use a throbber like thing. Because blank screen may seems to be like the application is not working properly
I will add localization to the splash image from my app.
I created the images and put them in the correct folder, but when I launch the application "updating" my app in the simulator it still shows the old image.
I tried to cleand and build with no results.
If I delete my app and istall it again, it works fine!
I did a test in 2 iphones from my company and in both I got the same behavior, I have to delete and install the app to update the images.
My question is: This will happen when I update the app on the apple store? The users will continue to see the old splash image?
Your users shouldn't see the old image when updating from the app store. From what I have seen and heard from others, the install process in the simulator from Xcode is more of a copy/paste action than and update/install action. As long as a clean run works fine, it should be safe to assume that your app store version will work fine as well.
One Suggestion.. if you just want to show SPLASH PNG image then just use default.png name of the splash image in you Resource folder... Don't code anything for splash png image...
iPhone will automatically detect this default.png as a splash image..
I am trying to display Default.png image when application starts. So user wont have to see that black screen. But the problem is its working fine on simulator but on device its not being loaded and black screen is being shown before app loads.
What could be problem?
Any help would be appreciated.
first delete your app from the device.
then when your app open on the xcode press on the upper bar product -> clean
make sure the image are name "Default.png"
run on your device! :)
Does it not show the Default.png at all, or just after a short period of time ?
Not at all: Try setting a new Default.png in the Organizer
After short time: When hitting build and run your app needs some time to start up, because the debugger is linking itself to your app, this causes a delay of a couple of seconds where your default.png is not displayed.
So I just made my web-application "iPhone Friendly". So you can add it to your home screen and it has an icon, no chroming, etc etc.
The problem is that I want to display a custom splash-screen every time it is opened from the iPhone home screen. Right now it just shows the last screen viewed while it basically runs a refresh.
I have tried attaching events to window.onfocus, window.onblur, window.onbeforeunload, and NONE of them seem to work right when the app is being run in "mobile-app" mode.
Am I being dumb? Er.... don't answer that. Does anyone know what is wrong?
Unfortunately, with the restrictions Apple imposes, this is impossible.
My recommendation is to create a App Store application with a full-screen WebView. Then, you can use a default.png file and a ImageView for your splash screen. Also, you get a ton more visibility on the App Store. (Also, if you go this route, check out PhoneGap - http://phonegap.com/).
Update!! In the iPhone 3.0 update, mobile safari now supports the ability to specify an image to be used on startup:
Remember this only works with iPhones that are running 3.0+
The loading screen you are talking about is the loading screen for an APPLICATION, not a webpage, i.e its the loading screen for Safari. This has nothing to do with "the restrictions Apple imposes", just with the fact that because your web app still runs in the browser, the browser needs to load first. Like was also said, if you want to get around this you need to build your own app, in which you can specify the splash screen.
Are you using this?
<meta name="apple-mobile-web-app-capable" content="yes" />
If yes, it should refresh every time when you exit the web app and enter again. It will NOT show the last screen viewed. Hence you can show your splash-screen every time when it is opened. In another words, you should show a full screen div / image every time when you load the page.